CN102866360B - A kind of power battery pack allows discharge power predictor method - Google Patents
A kind of power battery pack allows discharge power predictor method Download PDFInfo
- Publication number
- CN102866360B CN102866360B CN201210317949.5A CN201210317949A CN102866360B CN 102866360 B CN102866360 B CN 102866360B CN 201210317949 A CN201210317949 A CN 201210317949A CN 102866360 B CN102866360 B CN 102866360B
- Authority
- CN
- China
- Prior art keywords
- value
- discharge power
- battery
- soc
- pset
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Secondary Cells (AREA)
Abstract
A kind of power battery pack allows discharge power predictor method, the method calculates the permission discharge power Pset value under each temperature T of electric battery work and each SOC value of correspondence in advance, form discharge power table of comparisons MAP, and by this data pre-storage in battery management system database; Then adopt different account forms to obtain according to SOC value and allow discharge power value.This method has considered the factors such as electric battery internal resistance, minimum voltage, consistency of battery pack, and SOC segmentation is considered, makes electric battery allow discharge power to estimate more accurate.And battery management system can better control the electric discharge of electric battery according to the permission discharge power that the method obtains, and reduces the possibility of putting, and better protects electric battery.
Description
Technical field
The present invention relates to the improvement of electric battery control method.
Background technology
The permission discharge power predictor method of current battery group is more single, mainly carries out power by the temperature T of electric battery and SOC and estimates.This method not to consider in electric battery the factors such as each monomer battery voltage, internal resistance, consistance, when SOC there is error, the internal resistance of cell increases, battery inconsistency increases time, percentage of batteries likely can be caused to cross and to put and damage battery.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is to provide one and has considered electric battery, temperature, SOC value, voltage, internal resistance, each battery cell consistance factor, estimated that power battery pack allows discharge power predictor method accurately.
In order to solve the problems of the technologies described above, this technical matters adopts following scheme to solve:
A kind of power battery pack allows discharge power predictor method, and the method comprises the steps:
1). calculate the permission discharge power Pset value under each temperature T of electric battery work and each SOC value of correspondence in advance, form discharge power table of comparisons MAP, and by this data pre-storage in battery management system database;
2). when SOC value is more than or equal to 40%, from battery management system database, directly obtain permission discharge power Pset value now according to real time temperature T and SOC value;
When SOC value be less than 40% be more than or equal to 10% time, current minimum cell voltage value Vmin in the electric discharge lower voltage limit value Vo preset according to electric battery and electric battery, adopts following formula to obtain current permission discharge power Pset value:
Pset=MAP(SOC, T) × Kp × (Vmin-Vo)/Vo, wherein, Kp value is scale parameter;
When SOC value be less than 10% and 0< Vmin-Vo<0.1 time, current permission discharge power Pset value is: Pset=U × I, and wherein U is present battery group total voltage, and I is present battery group total current.
Compared with prior art, tool of the present invention has the following advantages:
1. this method has considered the factors such as electric battery internal resistance, minimum voltage, consistency of battery pack, and SOC segmentation is considered, makes electric battery allow discharge power to estimate more accurate.
2. battery management system can better control the electric discharge of electric battery according to the permission discharge power that the method obtains, and reduces the possibility of putting, and better protects electric battery.
Embodiment
The present invention to be described in further detail below in conjunction with embodiment for the ease of it will be appreciated by those skilled in the art that:
In electric automobile during traveling process, battery management system and each parameter of full-vehicle control unit Real-time Collection electric battery, and power battery pack allows discharge power pre-to adopt the method designed by the present embodiment to estimate.Specifically, the method comprises the steps:
First, calculate the permission discharge power Pset value under each temperature T of electric battery work and each SOC value of correspondence in advance, form discharge power table of comparisons MAP, and by this data pre-storage in battery management system database; MAP is as shown in the table for this discharge power table of comparisons:
| SOC/T | -35℃ | -30℃ | -20℃ | -10℃ | 0℃ | 10℃ | 20℃ | 40℃ | 55℃ |
| 5% | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 10% | 0 | 0 | 20 | 40 | 60 | 90 | 120 | 120 | 120 |
| 20% | 0 | 0 | 20 | 50 | 70 | 105 | 200 | 200 | 200 |
| 30% | 0 | 0 | 20 | 60 | 90 | 135 | 400 | 400 | 400 |
| 40% | 0 | 0 | 20 | 80 | 120 | 180 | 500 | 500 | 500 |
| 50% | 0 | 0 | 20 | 110 | 150 | 240 | 600 | 630 | 630 |
| 60% | 0 | 0 | 40 | 120 | 160 | 300 | 600 | 630 | 630 |
| 70% | 0 | 0 | 40 | 140 | 220 | 300 | 600 | 630 | 630 |
| 80% | 0 | 0 | 70 | 140 | 220 | 450 | 630 | 630 | 630 |
| 90% | 0 | 0 | 70 | 160 | 270 | 450 | 630 | 630 | 630 |
| 100% | 0 | 0 | 70 | 160 | 270 | 450 | 630 | 630 | 630 |
In electric automobile operational process, the current SOC value of battery management system Real-time Obtaining, determine according to battery behavior when SOC value is more than or equal to this value of 40%() time, directly obtain according to the discharge power table of comparisons MAP in upper table and allow discharge power Pset value, namely, Pset=MAP (SOC, T).
When SOC value be less than 40% be more than or equal to 10% time, represent electric battery by use a period of time, cell voltage value Vmin, the internal resistance of cell, SOC and the temperature T permission discharge power to electric battery that now electric battery is minimum accounts for major influence factors.Because now minimum monomer voltage is close to sparking voltage lower limit, now if any high power discharge, the large battery of internal resistance, due to the pressure drop in its internal resistance, causes its voltage lower, easily causes low-voltage variation or cross to put, so now must limit discharge power.Conversely, now electric battery allows discharge power value to be determined by above-mentioned factor.Current minimum cell voltage value Vmin in the electric discharge lower voltage limit value Vo preset according to electric battery and electric battery, adopts following formula to obtain current permission discharge power Pset value:
Pset=MAP(SOC, T) × Kp × (Vmin-Vo)/Vo, wherein, Kp value is scale parameter, is data statistics value.
When SOC value be less than 10% and 0< Vmin-Vo<0.1 time, the dump energy of electric battery is very low, and now large discharge power is easy to make voltage reach lower limit and protect, and therefore needs to limit in advance discharge power.Now, the total voltage U of battery management system Real-time Collection electric battery, electric battery total current I, then, current permission discharge power Pset value is: Pset=U × I.Otherwise, Pset value according to be less than in SOC value 40% be more than or equal to 10% time value, i.e. Pset=MAP(SOC, T) × Kp × (Vmin-Vo)/Vo, wherein, Kp value is scale parameter, is data statistics value.
The present invention has considered the factors such as electric battery internal resistance, minimum voltage, consistency of battery pack, and SOC segmentation is considered, makes electric battery allow discharge power to estimate more accurate.Battery management system can better control the electric discharge of electric battery according to the permission discharge power that the method obtains, and reduces the possibility of putting, and better protects electric battery.
Above-described embodiment is only wherein specific implementation of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these apparent replacement forms all belong to protection scope of the present invention.
Claims (1)
1. power battery pack allows a discharge power predictor method, and it is characterized in that, the method comprises the steps:
1). calculate the permission discharge power Pset value under each temperature T of electric battery work and each SOC value of correspondence in advance, form discharge power table of comparisons MAP, and by this data pre-storage in battery management system database;
2). when SOC value is more than or equal to 40%, from battery management system database, directly obtain permission discharge power Pset value now according to real time temperature T and SOC value;
When SOC value be less than 40% be more than or equal to 10% time, current minimum cell voltage value Vmin in the electric discharge lower voltage limit value Vo preset according to electric battery and electric battery, adopts following formula to obtain current permission discharge power Pset value:
Pset=MAP(SOC, T) × Kp × (Vmin-Vo)/Vo, wherein, Kp value is scale parameter;
When SOC value be less than 10% and 0< Vmin-Vo<0.1 time, current permission discharge power Pset value is: Pset=U × I, and wherein U is present battery group total voltage, and I is present battery group total current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210317949.5A CN102866360B (en) | 2012-08-31 | 2012-08-31 | A kind of power battery pack allows discharge power predictor method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210317949.5A CN102866360B (en) | 2012-08-31 | 2012-08-31 | A kind of power battery pack allows discharge power predictor method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102866360A CN102866360A (en) | 2013-01-09 |
| CN102866360B true CN102866360B (en) | 2015-10-28 |
Family
ID=47445348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210317949.5A Active CN102866360B (en) | 2012-08-31 | 2012-08-31 | A kind of power battery pack allows discharge power predictor method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102866360B (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104101838B (en) * | 2013-04-09 | 2017-05-10 | 广州汽车集团股份有限公司 | Power cell system, and charge state and maximum charging and discharging power estimation methods thereof |
| CN104868449B (en) * | 2014-06-30 | 2017-11-03 | 北汽福田汽车股份有限公司 | A kind of battery cell Cross prevention method and system |
| CN104766940B (en) * | 2015-04-09 | 2019-01-01 | 观致汽车有限公司 | The method for protecting battery pack by power limit |
| CN106019161B (en) * | 2016-05-18 | 2019-10-25 | 北京新能源汽车股份有限公司 | Method for evaluating state of power battery pack of electric vehicle and battery management system |
| CN106256593B (en) * | 2016-08-02 | 2018-12-07 | 威马汽车科技集团有限公司 | A kind of dual battery system discharge control method and system |
| CN107487202B (en) * | 2016-12-24 | 2020-03-24 | 宝沃汽车（中国）有限公司 | Vehicle battery protection method and device and vehicle |
| CN108879867B (en) * | 2018-08-01 | 2021-08-20 | 安徽锐能科技有限公司 | System for regulating charging power of battery pack |
| CN109100658B (en) * | 2018-08-01 | 2021-08-20 | 安徽锐能科技有限公司 | System for regulating discharge power of battery pack |
| CN108988427B (en) * | 2018-08-01 | 2021-08-20 | 安徽锐能科技有限公司 | Method for regulating charging power of battery pack |
| CN110286326A (en) * | 2018-11-23 | 2019-09-27 | 天津力神电池股份有限公司 | The method of rapid evaluation lithium-ion-power cell pulse power charging and discharging capabilities |
| CN109291798B (en) * | 2018-11-27 | 2020-11-17 | 安徽江淮汽车集团股份有限公司 | Power management strategy for pure electric vehicle |
| CN110244228B (en) * | 2019-07-17 | 2022-04-15 | 东软睿驰汽车技术（沈阳）有限公司 | Battery control method and device |
| CN110954829B (en) * | 2019-11-22 | 2021-03-26 | 山东信通电子股份有限公司 | Mobile Internet of things terminal power supply method and device and storage medium |
| CN111257770B (en) * | 2020-02-18 | 2022-07-08 | 宁波吉利汽车研究开发有限公司 | Battery pack power estimation method |
| CN112440826B (en) * | 2020-11-10 | 2022-07-15 | 桑顿新能源科技有限公司 | New energy vehicle power distribution method and system |
| CN114675193B (en) * | 2020-12-25 | 2024-07-12 | 宁德时代新能源科技股份有限公司 | Allowable power estimation method, battery management system and storage medium |
| CN117227576B (en) * | 2023-11-15 | 2024-02-27 | 广汽埃安新能源汽车股份有限公司 | Battery power control method, storage medium, and electronic device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1417503A1 (en) * | 2001-06-29 | 2004-05-12 | Robert Bosch Gmbh | Methods for determining the charge state and/or the power capacity of a charge store |
| CN102044717A (en) * | 2009-10-13 | 2011-05-04 | 上海空间电源研究所 | Maximum charge-discharge power control method of lithium-ion battery pack |
| CN102522796A (en) * | 2011-12-26 | 2012-06-27 | 惠州市亿能电子有限公司 | Method for stably giving power to power battery system |
| CN102577014A (en) * | 2009-10-19 | 2012-07-11 | 罗伯特·博世有限公司 | Method for precision power prediction for battery packs |
| CN102593893A (en) * | 2012-02-01 | 2012-07-18 | 广州市香港科大霍英东研究院 | System for realizing balanced discharging of battery sets |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009049589A1 (en) * | 2009-10-16 | 2011-04-21 | Bayerische Motoren Werke Aktiengesellschaft | Method for determining and / or predicting the maximum performance of a battery |
-
2012
- 2012-08-31 CN CN201210317949.5A patent/CN102866360B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1417503A1 (en) * | 2001-06-29 | 2004-05-12 | Robert Bosch Gmbh | Methods for determining the charge state and/or the power capacity of a charge store |
| CN102044717A (en) * | 2009-10-13 | 2011-05-04 | 上海空间电源研究所 | Maximum charge-discharge power control method of lithium-ion battery pack |
| CN102577014A (en) * | 2009-10-19 | 2012-07-11 | 罗伯特·博世有限公司 | Method for precision power prediction for battery packs |
| CN102522796A (en) * | 2011-12-26 | 2012-06-27 | 惠州市亿能电子有限公司 | Method for stably giving power to power battery system |
| CN102593893A (en) * | 2012-02-01 | 2012-07-18 | 广州市香港科大霍英东研究院 | System for realizing balanced discharging of battery sets |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102866360A (en) | 2013-01-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102866360B (en) | A kind of power battery pack allows discharge power predictor method | |
| CN103728563B (en) | A kind of measuring method of cell health state | |
| CN105068009B (en) | Battery cycle life Forecasting Methodology | |
| CN101819259B (en) | Method for evaluating consistency of battery pack | |
| CN102520361A (en) | State of health (SOH) value assessment method of battery pack | |
| CN103010046B (en) | A kind of method of dynamically middle estimation SOC | |
| CN102540096A (en) | Self-correction method for remaining capacity estimation of lithium iron phosphate power battery | |
| CN103149406B (en) | A kind of electric bridge for D.C. isolation monitoring device and operation method thereof | |
| CN102903976B (en) | A kind of pure electric automobile charging process SOC modification method | |
| CN104360286A (en) | Lithium ion battery charge state estimation modification method | |
| CN103701133B (en) | Powerless control method in HVDC (High Voltage Direct Current) transmission system low power run situation | |
| CN103884994B (en) | A kind of prevent lithium ion battery from crossing the SOC on-line checking and modification method put | |
| CN110970969B (en) | Alternate rest balance topology and control method of lithium ion power battery for electric ship | |
| CN102636759A (en) | Method for accurately calculating battery electric quantity system-on-chip (SOC) in real time | |
| CN103515663B (en) | The charging device of power brick charging method and employing the method | |
| CN103904747B (en) | Electric vehicle nondestructive charging system based on temperature curve and charging method of electric vehicle nondestructive charging system based on temperature curve | |
| CN111007411B (en) | Electric quantity state correction method of energy storage battery system | |
| CN105514987A (en) | 10kV distribution circuit distributed photovoltaic constant volume method and system | |
| CN104392275A (en) | Planning method for active power distribution network comprising distributed photovoltaic grid-connected network | |
| CN104502853A (en) | Lithium battery SOC (Stress Optical Coefficient) estimation method based on EKF (Extended Kalman Filter) | |
| CN104993530A (en) | Battery management system | |
| CN105260807A (en) | Electric automobile charging load estimation method considering random characteristics | |
| CN108011138A (en) | A kind of electric automobile discharge prevention method based on monomer ceiling voltage | |
| CN111080485B (en) | Line loss qualification area loss reduction method based on service and data integration | |
| Liu et al. | State of charge and peak power estimation of NCM/Li 4 Ti 5 O 12 battery using ic curve for rail tractor application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |